Yarn clearer



y 5, 1938- B. A. PETERSON 2,122,989

YARN CLEARER Filed July 10, 1936 3 INVENTOR .B ur-t A. PetersonATTORNEYS a... iii; 193 9 1 2,122,989

." .u:m rao s ra rizs r T-ENT OFFICE Application July 10, 19st, SerialNo. 89,915 r Glaims. (or. 28-88):

The invention pertains to yam clearers for use from ;which a thread oryarn 8 passes through in connection with winders or spoolers, and thethe yarn clearer generally designated 9, and from general object of theinvention is to provide an thence partially around a winding drum l andimproved yarn clearing device which is capable onto a cheese H.

of eflfectualiy clearing the thread or'yarn of par- 'Thedevice tcomprises a stationary'grip plate ticles of fiber, leaf and otherextraneous matter, 12, preferably providing a smooth flat surfaceandwhich is operative automatically to effect over which the yarnpasses; and a sensitive breakage of the thread or yarn to prevent'pasgripping element in the form of a blade H1 insage of gouts or otherenlargement onto the clined toward the plate I! in the direction of ap-1o cheese being wound. proach of the yarn, and swingably supportedAnother object is to provide a yarn clearing with its gripping edgespaced from the guiding device having a highly sensitive means forgripsurface of the plate H a distance determined by ping the yarn tobreak the same in order to pre-- the thickness of the yarn. vent passageof a gout, which is adjustable to As. herein shown, the plate.l2 isformed by a vary'the degree of sensitivity according to the vertical legof a horizontal angle bar 84 having kind and size of the yarn beingwound. one end suitably secured to the base l5 of a gen:

Another object is to provide a yarn clearing erally U-shaped frame l6having two laterally device of improved construction whichisadjustspaced standards ii. The other end of said bar able for difierentsizes of yarn, and which is projects laterally to one side of saidframe, which adapted for automatic operation by the winder similarlysupports a plurality of stationary yarn mechanism to release the yarn inthe event that guiding pins it in vertically spaced relation, four ithas been caught or gripped bythe operation such pins being herein shown.The three upper of the device in preventing the attempted passage pinsare adapted to cooperate with two prongs of a gout or other enlargement.IQ of a thread detector forming part of the 1 The objects of theinvention thus generally winder mechanism, and the two lower pins serve25 stated together with other and ancillary advanto guide the yarn forpassage over the smooth tages are attained by-the construction andarsurface of theplate l2 and between said surface rangement set forth byway of illustration in the and the lower free edge of the blade i3 whichis accompanying drawing, in which: A inclined downwardly toward theplate.

0 Figure 1 is a fragmentary side elevational view 7' The supportingstructure further includes as of the improved yarn clearing device shownin its herein shown, two interfitting U-s haped plates relation tothe'winder mechanism. 20 and 26 (Fig. 2) suitably mounted on a station-Fig. 2 is an enlarged end'elevational view of I ary member 22 of thewinder and carrying the the device as shown in Fig. 1 and illustratingU-shaped frame it, the base member iii of the manner in which it ismounted on the framewhich is secured to the upper plate 20 at one end 35work of the winder mechanism, which framework and rearwardly thereof.The opposite ends .of l is shown in section. I 4 said plates 20 and 2|have extensions 2!! and Fig. 3 is a front elevational view of thedevice. 1'! projecting laterally beneath the lowermost Fig.4 is afragmentary vertical sectional view pin i8 and respectively providingopposed vertitaken approximately in the plane of line 4-4 of callyspaced thread guiding surfaces 23 and 24, 40

Fig. the lower one of which is formed by the rear end Fig. 5 is afragmentary sectional view on an of a forwardly opening slot in theplate 'extenenlarged scale, taken approximately in the plane sion 2|.

of line 5--5 of Fig. 3 and illustrating the opera- The means forpivotally supporting the blade tion of the device in severing the yarnas an incil3 comprises a pair of pivot points 25 and 26 -45 dent to theattempted passage of an enlargement (Fig. 3) engaging in small-recessesin the oppothereon. site side edges of the blade. In the preferred Theimproved yarn clearer is adapted for use construction the blade iscarried'by a rock shaft in variousforms of winders or spoolers, but is21 suitably journaled in the frame members I1 particularly adapted foruse in connection with somewhat above and in rearwardly spaced rela- 50an automatic winder of the type disclosed in the tion to" the plate It.One end of this shaft '-pro- Colman Patents Nos. 1,267,977 and1,274,386, jects laterally from' its supporting frameparallel grantedMay 28, 1918 and August 6, 1918, reto the angle bar It, and thisprojecting end porspectively. In Fig. 1 I have shown the general tion iscutaway on its under side to form a notch relationship of the parts. 1designates a bobbin 28 so as to accommodate the pivot points 25 and 26which are mounted in the-opposite ends of the notch coaxially of theshaft. As clearly shown in Fig. 6, the notch 2| opens in a gen- .erallydownward direction with the bottom face thereof inclined downwardly inthe direction of the plate II. N

ards ll of thei'frame It. The rear leg of this clip has its lower endshaped to provide a flat lip portion 33 yieldably engaging a flat side34 formed .rearwardly of the shaft 21. Preferably the lip portion 33 ofthe clip is disposed angularly relative to the bottom of the notch 34 soas to engage therewith below the axis of the shaft, thereby exerting aconstant turning force on the shaft in a direction to hold the crank arm28 against the screw 30.

It will be observed that the blade [3 is pivotally supported upon theshaft in a manner such as to permit free turning movement thereofthrough a limited extent which in the present instance is sufficienttopermit movement of the lower free edge of the blade to perform itsthread-gripping function in cooperation with the plate. Normally theupper rear end of the blade is yieldably held in engagement with a stopor abutment 28 formed by the upper rear portion of the bottom 01. thenotch 28. This position would be maintained by the action of gravity,but in the preferred embodiment I do not depend upon gravity for thispurpose but employspring means susceptible of accurate adjustment tovary the force required to swing the blade in the operation of grippinga thread or yarn. Said spring means comprises in the present instance acoiled expansion spring 35 encircling the shank of a screw 36 projectingdownwardly and rearwardly in the notch 28 substantially perpendicular tothe bottom thereof. The spring bears between the head of the screw andawasher 31 engaging with the under side of the blade, which latter isprovided with an enlarged opening 38 to permit passage of the screwwithout interfering with the limited rocking motion of the bladerelative to the shaft.

It will be seen that the slot formed between the lower forward edge ofthe blade l3 and the rear face of the plate l2 may be varied in widthaccording to the normal thickness of the yarn being wound, merely bychanging the angular position of the rock shaft 21 by means of theadjusting screw 30. As shown, the edge of the blade is in the presentinstance serrated, and in the normal operation the blade serves to clearthe yarn of fibers and other-extraneous substances. In Fig. 3, brokenlines 8 and 8* indicate the range of lateral. motion imparted to theyarn in the winding operation. With such motion imparted to the yarn,the serrated edge of the blade in clear-.

is sumciently sensitive to respond to the abnormal force exerted on theblade by the gout in the pull of the thread, and to lift the blade,forcing its free edge against the plate I2 whereby to. clamp and breakthe yarn. By meansof the screw I8. the tension of the spring 3| opposingthe gripping action of the blade may be readily varied as may be desireddepending upon the kind and size of the yarn which is being wound. 1

To release a strand of yarn gripped by the blade II in cooperationwiththe plate ii, the

shaft 21 may be rocked counterclockwise by'depressing the crank arm 28;When the device is used in connection with an automatic winder of thetype shown in Patent No. 1,267,977, the traveling mechanism of thewinder is provided with a cam bar arranged to depress the crank am. To

limit rotational movement of the shaft 11 the,

latter has. a stop pin 38 engageable with the bracket 3|.

I claim as my invention:

1. A yarnclearer having, in combination, means I providing a yarnguiding surface, a rock shaft spaced from said surface and disposedsubstan tially perpendicular to the direction of travel of the yarn, ablade having a pivotal support 'co-' axial with the shaft and inclinedin the direction of approach of the yarn, said shaft-having an abutmentlimiting pivotal movement of the blade in a direction away from saidsurface, and spring means yieldably holding said blade against saidabutment.

2. A yarn clearing device comprising, in combination, means providing ayarn guiding sur: face, a shaft mounted in spaced relation to saidsurface and disposed substantially horizontally to the direction oftravel of the yarn, said shaft having a notch in one side thereof, pivotpoints mounted in said shaft in the ends of said notch. a blade mountedon said pivot points and inclined in the direction of approach of theyarn with one end of the blade spaced a predetermined distance from saidsurface, and means including a spring acting upon the opposite end ofsaid blade to hold it against the bottom of said notch.

3. A yarn clearing device comprising, in combination, means providing ayarn guiding surface, a supporting member mounted in spaced relation tosaid surface, said member having a notch in one side thereof, pivotpoints mounted in said member in the ends of said notch, a blade mountedon said pivot points and inclined in the direction of approach of theyarn with one end of the blade spaced a predetermined distance from saidsurface, the opposite endof said blade having an opening therein, ascrew anchored in the ,member and passing loosely through said opening,and a springencircling said screw and yieldably holding the bladeagainst swinging movement relative to the member. I

4. A yarn clearing devicecomprising, in combination,- means providing afixed upright guiding surfaceover which the yarn is adapted to pass inan upward direction, a supporting member, a blade mounted on said memberto turn on a horizontal axis and inclined downwardly from said axis withits lower edge normally spaced from said surface a distancecorresponding to the northe blade and said supporting member foryieldably resisting movement in the opposite direction.

5. A yarn clearing device comprising, in combination, means providing ayarn guiding surface, a rotatively adjustable supporting member mountedin spaced parallel relation to said surface and providing an abutment, ablade swingably mounted on said member and disposed in inclined relationto said surface with one edge portion adapted to cooperate with saidsurface, said blade having a part engageable with said abutment, andspring means carried solely by said supporting member acting to holdsaid part yieldably against said abutment.

6. A yarn clearing device comprising in combination, means providing ayarn guiding surface, a supporting member providing an abutment, a bladepivotally mounted on said supporting member and inclined in thedirection of approach of the yarn with one edge portion adapted tocooperate with said surface, said blade having a part engageable withsaid abutment, spring means on said supporting member acting to holdsaid part yieldably against said abutment, said supporting member beingmounted for rotational movement, a stationary stop, and means includinga spring for holding said member against said stop.

7. A yarn clearing device comprising, in combination, a stationarymember having a yarn guiding surface, a blade inclined relative to saidsurface and having one edge adapted to cooperate with said surface,means pivotally supporting the blade comprising a rock shaft, anabutment on the rock shaft for limiting pivotal movement of the blade,adjustable spring means carried solely by the rock shaft for holding theblade against said abutment, and means for turning the rock shaft tovary the position of the edge of the blade relative to said yarn guidingsurface.

' BURT A. PETERSON.

